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Oxycephalus Clausi Bovallius, 1887

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Oxycephalus Clausi Bovallius, 1887 NATIONAL BIORESOURCE DEVELOPMENT BOARD Dept. of Biotechnology Government of India, New Delhi For office use: MARINE BIORESOURCES FORMS DATA ENTRY: Form- 1(general) Ref. No.: (Please answer only relevant fields; add additional fields if you require) Fauna : √ Flora Microorganisms General Category : Invertebrata (Zooplankton), Pelagic amphipods Scientific name &Authority: Oxycephalus clausi Bovallius, 1887. Common Name ( if available) : Synonyms: Author(s) Status Oxycephalus clausi Bovallius 1887 a, p. 35 Oxycephalus tuberculatus Bate 1862, p.343, pl.54, fig.5 Oxycephalus piscator Claus 1879 b, p.190 Oxycephalus erythraeus Cecchini 1929, p.6 Oxycephalus mancinni Cecchini 1929, p.7 Classification: Phylum: Arthropoda Sub- Phylum: Mandibulata Super class: Class: Crustacea Sub- Class: Malacostraca Super Order: Peracarida Order: Amphipoda Sub Order: Hyperiidea Super Family:Platysceloidea Family:Oxycephalidae Sub-Family: Genus: Oxycephalus Species: clausi Authority: Bovallius Reference No : Bovallius, C., 1887a. Systematical list of the Amphipoda Hyperiidea. Bihang till Kungliga Sevenska Vetenskapsakademiens Handlingar., 11 (16): 1-50. Geographical Location: A very widely distributed species, commonly seen in the world oceans including the Mediterranean and the Red Sea . Its geographical limits varied between 43 N and 41 47’S. In the Indian Ocean its distribution ranged from Latitude: 25°Wto 120°E Place: Longitude: 30°N to 40°S State: Environment Freshwater: Yes/ No Habitat: Marine Salinity:33-35% Brackish : Yes/No Migrations: Temperature:20-28°C Salt Water : Yes√/No Depth range: 0-200 Picture (scanned images or photographs of adult/ larval stages) Oxycephalus clausi A1 - adult male, A2 – cephalon (adult male), A3 – cephalon (juvenile male), A4 – cephalon (adult female). Oxycephalus clausi A, B1 & B2 – pereopods 1 and 2, C to F – pereopods 4 to 7, G – Uropods and telson, H 1 – antenna 1, I – abdomen. H 2 – antenna 2 (female). DATA ENTRY FORM: Form –2 (Fish/ Shell fish/ Others ) Ref. No.: (Please answer only relevant fields; add additional fields if you require ) Form- 1 Ref. No.: IMPORTANCE: Landing statistics (t/y) : from to Place : Ref . No.: Main source of landing : Yes/ No Coast: east/ west Importance to fisheries : Main catching method : Used for aquaculture :yes/ never/ rarely Used as bait: yes/no/ occasionally Aquarium fish :yes/ no/ rarely Game fish : yes/ no Dangerous fish :poisonous/ harmful/ harmless Bioactivity :locally known/ reported/ not known Details: Period of availability: Throughout the year – yes/ no If no, months SALIENT FEATURES: Morphological: Diagnostic characteristics: Rostrum prominent. Carpus of pereopods 1&2 with outer distal tooth, cutting edge of the chela of pereopod 2 with high blunt teeth on the thumb and low cusps on the movable finger. Basis of pereopod 5 enlarged, clearly longer than broad, basis of 6th pereopod as long as broad and nearly circular. Pereopod 7 with elongate ovate basis. First 3 pleon segments regularly decreasing in depth backwards, each segment postero – laterally produced into a pair of sharp processes with border between the processes deeply concave. Sex attributes : Dimorphic Male: The 1st segment of the flagellum of antenna 1 in males has a characteristic projection in the distal part of the anterior margin. Female: First antenna reduced, second absent. Descriptive characters: Meristic characteristics: Feeding habit: Feeds on micro zooplankton Main food: Feeding type: Additional remarks: The most diagnostic character of O. clausi is the presence of two spines separated by a deep concavity at the postero – lateral corner of pleon segments one to three . Equally characteristic is the presence of a blunt projection (male) or a strong spine (female) on the outer distal part of the carpus of pereopods one and two , particularly the latter and the strongly dentate cutting edge of the chela of the second pereopod of the females. Size and age : Maximum length (cm ) (male/ female/ unsexed) Ref. No.: Average length (mm) (male/female/unsexed) Ref. No.: Male 8.28-34, Female 7.04-36.8, Juvenile 1.98to 7.6 Maximum weight: (g) (male/female/unsexed) Ref. No.: Average weight: (g) (male/female/unsexed) Ref. No.: Longevity (y) (wild) : (captivity) Ref. No.: Length/ weight relation ships: Eggs and larvae : Ref .No.: Eggs are stored in the brood pouch and fully developed juveniles hatch out from the brood pouch. Characteristics : Abundance : Biochemical aspects : Proximate analysis :moisture /fat /protein/ carbohydrate / ash Ref. No.: Electrophoresis: Ref .no.: SPAWNING INFORMATION: Locality: Main Ref: Season: Fecundity: Comment: MAJOR PUBLICATIONS (INDIAN): (Include review articles, monographs, books etc.) Pillai, N.K., 1966a. Pelagic Amphipoda in the collections of the Central Marine Fisheries Research Institute, India, Part 1, Oxycephalidae. In Proceedings of the Symposium on Crustacea, I. Marine. Biological. Association of India: 169-204. Nair, K.K.C. and K.V. Jayalakshmy, 1992. Distribution of oxycephalidae (Hyperiidea – Amphipoda) in the Indian Ocean – A Statistical Study. Oceanography of the Indian Ocean, Oxford and IBH Publications, 201-210. Ed. By B.N. Desai. Nair, K.K.C., 1992. Distribution, ecology and polymorphic behaviour of the genus Oxycephalus ( Hyperiidea, Oxycephalidae) in the Indian ocean. In: Oceanography of the Indian Ocean, edited by B.N.Desai, Oxford and IBH, New Delhi, 129- 142 Nair, K.K.C (1995) Taxonomic Features And Identification Of Oxycephalidae, Mahasagar, Vol.28. No 1&2. LIST OF INDIAN EXPERTS (Name, address, phone, fax, e-mail etc.) Dr.K.K.C.Nair Scientist-In-Charge R.C. of NIO, Post Box-1616 Kochi – 682 014 Dr. N. Krishna pillai “Radhika” 65- Champaka Nagar Bakery Junction Trivandrum-695 001 ACKNOWLEDGEMENT: (List of persons who contributed, modified or checked information) .
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